#定义变量
num1 = "100"
num2 = "1.99"
#强制类型转换
print(type(num1))
print(type(num2))

print(type(int(num1)))
print(type(float(num2)))
print(type(float(num1)))

info = 12345
print(type(info))
info1 = [11,"aa",True,1.88]
print(type(info1))
print(type(str(info1)))
print(str(info1))
print(type(tuple(info1)))
print(tuple(info1))

info2 = [11,22,33,11,11,33,77]
print(info2)
print(set(info2))
print(type(set(info2)))